18 Questions
What is the formula for pulmonary ventilation?
Tidal volume x Respiratory rate
Which of the following defines alveolar ventilation?
Pulmonary ventilation minus dead space volume
What effect does shallow rapid breathing have on alveolar ventilation?
Decreases alveolar ventilation
How does an increase in dead space affect alveolar ventilation?
Decreases alveolar ventilation
In which zone of pulmonary perfusion does blood flow occur only during systolic blood pressure?
Zone 2
Under what condition does blood flow occur in Zone 1 of pulmonary perfusion?
When alveolar pressure is less than pulmonary capillary pressure
What is the average ventilation-perfusion ratio (VA/Q) in the base of the lung?
0.6
Which condition is associated with a high ventilation-perfusion ratio (VA/Q)?
Emphysema
What happens to the ventilation as you move from the base to the apex of the lung?
Decreases
In which part of the lung is there significantly more ventilation than perfusion?
Apex
What is the main consequence of low ventilation-perfusion ratio (VA/Q)?
Decreased gas exchange
Which condition results in less perfusion due to pulmonary thrombi or emboli?
Pulmonary thrombi
What is the primary function of dead space?
To warm, moisten, and filter inspired air
Which of the following statements about dead space is true?
Dead space is responsible for the difference between pulmonary ventilation and alveolar ventilation
What is the relationship between anatomical dead space and physiological dead space?
Anatomical dead space and physiological dead space are equal under normal conditions
What is the effect of sympathetic stimulation on the volume of dead space?
It increases the volume of dead space
What is the definition of alveolar ventilation?
The volume of air reaching the alveoli per minute
How is alveolar ventilation related to pulmonary ventilation?
Alveolar ventilation is less than pulmonary ventilation due to the presence of dead space
Explore the concept of ventilation perfusion matching and dead space in the respiratory system. Learn about factors affecting the volume of dead space, the relationship between dead space and the conducting zone, types of dead space, and the importance of dead space. Test your knowledge on how sympathetic and parasympathetic stimulation can impact dead space volume.
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